Vulnerability · Published Jun 17, 2026 · Assigned by mitre
CVE-2026-39199
Low 2.9
In plain English
A low-severity out-of-bounds write in Snes9X from Snes9X team. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)2.9Low
Exploit odds (30 days)0.1%top 97.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
snes9x 1.63 allows an out-of-bounds write and denial of service via a crafted .ups file.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libretro-snes9x | no fix listed | DEBIAN-CVE-2026-39199 |
| Debian:13 | libretro-snes9x | no fix listed | DEBIAN-CVE-2026-39199 |
| Debian:14 | libretro-snes9x | 1.63+dfsg-2 | DEBIAN-CVE-2026-39199 |
| Ubuntu:22.04:LTS | libretro-snes9x | no fix listed | UBUNTU-CVE-2026-39199 |
| Ubuntu:24.04:LTS | libretro-snes9x | no fix listed | UBUNTU-CVE-2026-39199 |
| Ubuntu:25.10 | libretro-snes9x | no fix listed | UBUNTU-CVE-2026-39199 |
| Ubuntu:26.04:LTS | libretro-snes9x | no fix listed | UBUNTU-CVE-2026-39199 |
| Ubuntu:26.10 | libretro-snes9x | no fix listed | UBUNTU-CVE-2026-39199 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Snes9X team | Snes9X | 1.63 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L